The US and Australia are the only civilized countries left, and we are fading fast.

Are you really saying that you can't imagine an indident like this happening in the US or Australia, let alone Britain at any time in the past? If you really believe that, then, if you'll forgive me saying so, you must have been fortunate in living a life sheltered from what, as a number of other posters on this thread have ponted out, is the pretty well universal capacity of children to regress to a feral condition.

The murder rate in the US is almost six times as high as in most western and central European countries. Just as an example (not to mention general violence, the homeless on the streets, the druggies, etc.).

Perhaps your definition of “civilized” differs from the accepted norm?